further ideas for _comp_variable_assignments completions

[calestyo]

Describe the feature/solution

Hey.

Just a few ideas, what could be added for completion as part of _comp_variable_assignments():

• LANGUAGE as used by GNU gettext (which makes it IMO fairly "standardised")
  AFAIU, this is not just a locale string as in LC_ALL or so but something like nb:no. See https://www.gnu.org/software/gettext/manual/html_node/The-LANGUAGE-variable.html#The-LANGUAGE-variable and according to https://superuser.com/a/392466 even more than two fields can be used like in fr:de:en.

• PATH
  Directories not containing a : (I think this is separated by :.
  POSIX' definition of it can be found here: https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap08.html
  In particular, it's possible to have a zero-length prefix by either leading/trailing : or multiple adjacent :.

As said, these are just some ideas that might make sense - I don't have any strong need for this, so if you don't like the idea, just close it.

Thanks,
Chris.

[akinomyoga]

They are good ones to support, though the concept that GNU is a "standard" is not acceptable. There are many places in bash-completion where the generated completions can be improved, so the priority of the support for this Issue among such is not so high (unless you submit a PR for it), but we can keep this issue open.